Coaxial counter-rotating dual-rotor shafting bearing test mounting structure

The utility model provides a coaxial contra-rotating dual-rotor shaft system bearing test installation structure. The coaxial contra-rotating dual-rotor shaft system bearing test installation structure comprises a hollow outer rotor shaft; the inner rotor wing shaft is rotationally arranged in the hollow outer rotor wing shaft; the lower end of the hollow outer rotor shaft is in transmission connection with the power unit; the lower end of the inner rotor shaft is in transmission connection with the power unit; a first test bearing and a second test bearing are sequentially mounted at the lower end of the hollow outer rotor shaft from bottom to top; the lower end of the inner rotor shaft is rotationally connected with the hollow outer rotor shaft through a fourth test bearing; the inner rotor shaft and the hollow outer rotor shaft are driven by the power unit to rotate, the to-be-tested bearing pack installed on the inner rotor shaft and the hollow outer rotor shaft is matched, the to-be-tested bearing pack i